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Nitrogen fixation in root nodules of Alnus is brought about by:
Options
(a) Bradyrhizobium
(b) Clostridium
(c) Frankia
(d) Azorhizobium
Correct Answer:
Frankia
Explanation:
The most common symbiotic association of legume and bacteria on roots is as nodules, which are small outgrowth on the roots. The microbe Frankia is symbiotic in root nodules of several non-leguminous plants like Casurina and Alnus. Both Rhizobium and Frankia are free lilving in soil but can fix atmospheric nitrogen as symbionts.
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Question Type: Memory
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Difficulty Level: Easy
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Topics: Plant Physiology
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Subject: Biology
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A person with XXY sex chromosomes suffers from
- Tribe is an independent category between sub-family and
- Seed coat is not thin membranous in
- Bulk of carbon dioxide (CO₂) released form body tissues into the blood is present as
- Which of the following is formed in S. Miller’s classic experiment?
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Plant Physiology (28)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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